Bagaimana untuk menanyakan jenis data dalam oracle

select column_name,data_type,DATA_LENGTH From all_tab_columns where table_name=upper('表名') AND owner=upper('数据库登录用户名');

select column_name,data_type,DATA_LENGTH From all_tab_columns
where table_name=upper('t_department') AND owner=upper('scott')

select * from cols WHERE TABLE_name=upper('表名'); (user_tab_columns缩写cols)

select DATA_TYPE from User_Tab_Columns t where t.column_name=upper('列名') and t.table_name =upper(trim('表名'));

select * from user_tab_columns where table_name = upper(‘表名’);

select column_name,data_type,data_length,DATA_PRECISION ,DATA_SCALE from all_tab_columns where table_name=upper('表名');

select * from user_constraints where table_name = upper('表名');

select * from user_constraints where constraint_type='P'
and TABLE_name=upper('表名');